Used Freightliner 12 Speed Sleeper Semi Trucks For Sale by Dealerships

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2021 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$54,999 USD

FEDEX SPEC CALL TIPTON CONQUEST FOR TRUCK AND TRAILER SALES!,

Condition	Used
Usage	474,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	13813860
Category	Sleeper Semi Trucks
Last Updated	12/22/2025
Location	Odenville, AL, US
Sold By	Used Truck and Trailer, Inc.

(844) 321-___ SHOW
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2023 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$85,900 USD

Balance of Detroit Diesel 5 Year/500K Mile Major Components (PARTS ONLY) Warranty and 5 Year/750K Mile Basic Transmission Warranty In Service: 09/19/2022, LEAD TRUCK,

Condition	Used
Usage	5,631 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	1718
MLS Number	14044092
Category	Sleeper Semi Trucks
Last Updated	12/31/2025
Location	Fontana, CA, US
Sold By	Yerevan Truck & Equipment Sales

(844) 321-___ SHOW
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Featured Item

2024 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

$95,900 USD

Balance of Detroit Diesel 5 Year/500K Mile Major Components (PARTS ONLY) Warranty and 5 Year/750K Mile Basic Transmission Warranty In Service: 03/06/2023,

Condition	Used
Usage	5,326 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	1714
MLS Number	14044040
Category	Sleeper Semi Trucks
Last Updated	12/31/2025
Location	Fontana, CA, US
Sold By	Yerevan Truck & Equipment Sales

(844) 385-___ SHOW
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Featured Item

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Condo Sleeper, 455HP, 12 Speed Automatic

$43,000 USD

Condition	Used
Usage	943,871 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15 GHG'21 455/1500
Transmission	12 Speed Automatic
Sleeper Type	Condo Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.85 ratio
Stock Number	569523
MLS Number	14042329
Category	Sleeper Semi Trucks
Last Updated	1/16/2026
Location	Kearny, NJ, US
Sold By	Ryder

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$53,250 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 547,358 miles, 72" integral sleeper, 455 HP DD15AT diesel engine, 12-speed Detroit automatic transmission, tandem rear axle,...

Condition	Used
Usage	547,359 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	372073
MLS Number	13899597
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Round Rock, TX, US
Sold By	Penske Used Trucks

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$57,250 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 458,986 miles, 455 HP DD15AT diesel engine, 72" integral sleeper, 12-speed automatic Detroit transmission, tandem rear axle,...

Condition	Used
Usage	458,986 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	381571
MLS Number	13520239
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Greeley, CO, US
Sold By	Penske Used Trucks

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$55,500 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 517,172 miles, 455 HP DD15AT diesel engine, 12-speed automatic Detroit transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	517,172 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	380856
MLS Number	14014854
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Indian Trail, NC, US
Sold By	Penske Used Trucks

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$52,000 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 592,065 miles, 455HP DD15AT diesel engine, 12-speed automatic Detroit transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	614,796 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	380761
MLS Number	13867996
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Rockwall, TX, US
Sold By	Penske Used Trucks

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$53,500 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck with 72" integral sleeper, 455HP DD15AT diesel engine, 12-speed Detroit automatic transmission, tandem rear axle, air ride suspension,...

Condition	Used
Usage	546,232 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	344972
MLS Number	14014789
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Hebron, KY, US
Sold By	Penske Used Trucks

(855) 717-___ SHOW
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2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Newly Listed

Contact for price

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** 12 SPEED AUTOMATIC!!! DEF, ENGINE BRAKE, SLIDING 5TH WHEEL, SLEEPER WINDOW Se Habla Español! NO CREDIT? BAD CREDIT? NO...

Condition	Used
Usage	419,746 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.28 ratio
Stock Number	N15292-DELIEVERY 2 U
MLS Number	14097572
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Turlock, CA, US
Sold By	Diamond Truck Sales Inc

(855) 717-___ SHOW
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2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Newly Listed

$58,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** 12 SPEED AUTOMATIC!!! DEF, ENGINE BRAKE, SLIDING 5TH WHEEL, SLEEPER WINDOW Se Habla Español! NO CREDIT? BAD CREDIT? NO...

Condition	Used
Usage	434,584 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.28 ratio
Stock Number	N15293-DELIVERY 2 U
MLS Number	14097571
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Turlock, CA, US
Sold By	Diamond Truck Sales Inc

(844) 624-___ SHOW
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2022 Freightliner Cascadia 126 Sleeper Semi Truck - 76" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Recently Updated

$62,950 USD

For sale: Low-mileage DD13-powered Cascadia's, fully equipped with APUs, warranty remaining! **Factory Warranty Remaining**, Cab Corrosion-3/3/2027, Frame Rails-3/3/2028,...

Condition	Used
Usage	369,503 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.28 ratio
Stock Number	CO11021
MLS Number	14065714
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Kansas City, MO, US
Sold By	Michelle Sells Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$50,000 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 623,630 miles, 455 HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	623,630 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	351407
MLS Number	13803287
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Boaz, AL, US
Sold By	Penske Used Trucks

(866) 530-___ SHOW
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2020 Freightliner Cascadia 126 Sleeper Semi Truck - Detroit 455HP, 12 Speed Dt12 Automatic

Recently Updated

$60,995 USD

2020 FREIGHTLINER CASCADIA 126, DETROIT DD15, DETROIT DT12 AUTOMATIC TRANSMISSION, 453,524 MI, FLEET MAINTAINED FINANCING AVAILABLE FOR ALL CREDIT TYPES, ZERO DOWN AVAILABLE ON APPROVED...

Condition	Used
Usage	453,524 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	0739
MLS Number	14029246
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 60" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$71,250 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 208,532 miles, 455HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 60" integral sleeper, tandem rear axle,...

Condition	Used
Usage	208,532 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	60"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.55 ratio
Stock Number	352265
MLS Number	13729841
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Newark, OH, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$60,250 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 458,570 miles, 505 HP DD15AT diesel engine, 12-speed automatic Detroit transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	458,570 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	352006
MLS Number	13800796
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Clackamas, OR, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$51,500 USD

Used 2020 Freightliner Cascadia 125 Sleeper Semi Truck for sale, 509,463 miles, 455 HP DD15AT diesel engine, 72" integral sleeper, 12-speed Detroit automatic transmission, tandem rear axle,...

Condition	Used
Usage	509,511 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	349208
MLS Number	14013952
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Piqua, OH, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$54,250 USD

Used 2020 Freightliner Cascadia 125 Sleeper Semi Truck for sale, 465,664 miles, 72" integral sleeper, 455 HP DD15AT diesel engine, 12-speed automatic transmission, tandem rear axle, air ride...

Condition	Used
Usage	465,679 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	349207
MLS Number	14013951
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Piqua, OH, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$54,000 USD

Used 2020 Freightliner Cascadia 125 Sleeper Semi Truck, 455HP DD15AT engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle, air ride suspension, diesel fuel...

Condition	Used
Usage	470,472 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	349204
MLS Number	13800740
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Piqua, OH, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$46,000 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 609,220 miles, 455HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle....

Condition	Used
Usage	609,220 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	348849
MLS Number	13738739
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Minoa, NY, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$55,000 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 539,962 miles, 455 HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	539,962 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	348848
MLS Number	13738738
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Minoa, NY, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 400HP, 12 Speed Automatic

Recently Updated

$44,250 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 697,220 miles, 400HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	697,220 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	400 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.28 ratio
Stock Number	291385
MLS Number	14049002
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Suwanee, GA, US
Sold By	Penske Used Trucks

2019 Freightliner Cascadia 125 Sleeper Semi Truck - 72" Integral Sleeper, 455HP, 12 Speed Automatic

Recently Updated

$49,750 USD

Used 2019 Freightliner Cascadia 125 Sleeper Semi Truck, 472,339 miles, 455HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle, air ride...

Condition	Used
Usage	472,339 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	226789
MLS Number	14051521
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Greeley, CO, US
Sold By	Penske Used Trucks

(844) 385-___ SHOW
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2019 Freightliner Cascadia 126 Sleeper Semi Truck - 73" Condo Sleeper, 455HP, 12 Speed Automatic

Newly Listed

$48,713 USD

Condition	Used
Usage	642,737 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	DD15 GHG'17 455/1650
Transmission	12 Speed
Sleeper Type	Condo Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.08 ratio
Stock Number	861219
MLS Number	14097192
Category	Sleeper Semi Trucks
Last Updated	1/18/2026
Location	Atlanta, GA, US
Sold By	Ryder